[ANIMAL PHYSIOLOGY] You are probably quite nervous about the exam. You notice that your heartbeat is faster and stronger than normal. Which of the following statements is true, then? Select one: O a. None of these is true. O b. Acetylcholine is increasing the permeability of sodium and calcium channels in the pacemaker cells. Oc. Your sympathetic nerves are releasing acetylcholine onto the sinoatrial node. O d. Your sympathetic nerves are releasing epinephrine onto pacemaker cells that cause an increase in K* permeability. Nor-eninephrine is released onto pacemaker cells causing their resting potential to rise more quickly

[ANIMAL PHYSIOLOGY] You are probably quite nervous about the exam. You notice that your heartbeat is faster and stronger than normal. Which of the following statements is true, then? Select one: O a. None of these is true. O b. Acetylcholine is increasing the permeability of sodium and calcium channels in the pacemaker cells. Oc. Your sympathetic nerves are releasing acetylcholine onto the sinoatrial node. O d. Your sympathetic nerves are releasing epinephrine onto pacemaker cells that cause an increase in K* permeability. Nor-eninephrine is released onto pacemaker cells causing their resting potential to rise more quickly

Human Anatomy & Physiology (11th Edition)

11th Edition

ISBN:9780134580999

Author:Elaine N. Marieb, Katja N. Hoehn

Publisher:Elaine N. Marieb, Katja N. Hoehn

Chapter1: The Human Body: An Orientation

Section: Chapter Questions

Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

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